Pagini recente » Cod sursa (job #1250040) | Cod sursa (job #2660049) | Cod sursa (job #2890790) | Cod sursa (job #662456) | Cod sursa (job #2901897)
#include <stdio.h>
#include <vector>
#include <queue>
using namespace std;
#define MAX_N 50000
#define INF 1e9
struct Edge {
int node, cost;
};
inline bool operator<(const Edge& e1, const Edge& e2) {
return e1.cost > e2.cost;
}
int noNodes, noEdges;
vector<Edge> graph[MAX_N];
bool wasProcessed[MAX_N];
int dist[MAX_N];
priority_queue<Edge> heap;
void dijkstra(int node) {
int i;
Edge top;
for (i = 0; i < noNodes; ++i)
dist[i] = INF, wasProcessed[i] = false;
heap.push({node, 0});
dist[node] = 0;
while (!heap.empty()) {
top = heap.top();
heap.pop();
if (!wasProcessed[top.node]) {
wasProcessed[top.node] = true;
for (Edge edge : graph[top.node])
if (dist[edge.node] > top.cost + edge.cost) {
dist[edge.node] = top.cost + edge.cost;
heap.push({edge.node, dist[edge.node]});
}
}
}
}
int main() {
FILE *fin, *fout;
fin = fopen("dijkstra.in", "r");
fout = fopen("dijkstra.out", "w");
int i, x, y, c;
fscanf(fin, "%d%d", &noNodes, &noEdges);
for (i = 0; i < noEdges; ++i) {
fscanf(fin, "%d%d%d", &x, &y, &c);
--x, --y;
graph[x].push_back({y, c});
}
dijkstra(0);
for (i = 1; i < noNodes; ++i)
fprintf(fout, "%d ", dist[i] == INF ? 0 : dist[i]);
fclose(fin);
fclose(fout);
return 0;
}